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Issue
Korean Journal of Chemical Engineering,
Vol.34, No.7, 1980-1984, 2017
Changes of absorption spectra, SUVA254, and color in treating landfill leachate using microwave-assisted persulfate oxidation
Kim YB, Ahn JH
We experimentally determined the effects of microwave-assisted persulfate oxidation (MAPO) on absorbance spectra, specific ultraviolet absorbance at a wavelength of 254 nm (SUVA254), and color in treating landfill leachate. The effects of treatment temperature (60≤T≤90 °C) and sodium persulfate (SPS) concentration (0.05≤[SPS]≤0.3M) were characterized. An absorbance band in the visible region disappeared after MAPO, but the absorbance in UV region remained. SUVA254 of treated leachate varied from 2.3 to 14.7 L/mg.m. Color number (CN) removal of 99% (CN=0.004 cm-1) was achieved within 30min with MAPO at 80 °C and [SPS =0.2M. As T and [SPS] increased, CN and total organic carbon decreased, but SUVA254 increased.
Keywords: Advanced Oxidation; Process Technology; Removal; Spectroscopy; Wastewater
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